Bit-stock



H. SMILEY.

BIT STOCK. No. 36,214. Patented Jan. 18, 1887.

ilmrne STATES FFLCE.

BIT-STOCK.

HENRY SMILEY, or BOSTON, MASSACHUSETTS.

SPECIFICATION. forming part of Letters Patent No.,356,214, dated January18, 1887, Application filed May 3,1886. Serial No. 201,110. (Modem V .Toall whom it may cone rm h of said shank a, as shown in Fig. 1. Imake.

Be it known that I, HENR SMILEY, ofBoston, in the county of Suffolk andState of Massachusetts, have invented new and useful Improvements inBit-Stocks, of which the following, taken in connection withtheaccompanying drawings, is a specification.

My invention relates to improvements in bit-c stocks; and the objects ofmyimprovements are to provide, first, a bit-stock with a removableshaft, that the tool holder or chuck may be 'used' in a parallel planeto the plane of the traight arm; second, to facilitate the adjustment'ofthe jaws of the tool-holder and the bit; third, to hold the bit moreSecurely; and I at tain these objects by means of the mechanismillustrated in the accompanying drawings, in

which-- 3 Figure-1 is a side elevation of my invention in part section.Fig; 2 is a side elevation of the shaft of the tool-holder and jaws.Fig. 3

is a side elevation of the shaft of the toolholder and shank, withbevel-gearing and loose jacket. Fig. i is an elevation in perspective ofthe loose, barrel. Fig. 5 is a side elevation of the stock or head,with,the tool-holder in ordinary position, and loose jacket Fig. 6 is atop plan of the key used in the stock or head.

Fig. 7.is a transverse vertical section showing those parts which are atthe right of line a" a;

in Fig. 1. Fig. 8 is a planof the end of .the bit-holder shaft.

I will now describe my invention when the bit is to bore in a planeparallel to the straight arm, as shown inFig. 1.v d

In Fig. 1, A. is the resser; B, thecrankarm; O, the handle; D, the,straight arm; E, the. stock or head, constructed with a Vertical bore,H, and a horizontal recess, J ,into which a key, G, is placed, said keyG- being .better shown in Fig. 6,-and'havin'g a circular slot, d, andsquare slot 6, and rectangnlar'slot f, and

knob g. F is a remoVableshafu'w-ith a solid putting said shank a throughsaid bore H in v said head E,

and also through the said slotd in said key G, and then pressing saidkey G into said-head E by means of said knob a-the square slot e fittingupon-the square portion "the shoulder firm said key G by screw k, whichpasses into in Fig. 6) in key G. Said shaft F has a tubular recess, 0,in its lower end, to receive an arbor, K, whieh'is cast solid with andforms part of a hollow handle, L. K is an arbor,

'the head E and the rectangular slot f (shown which,'being placed insaid recess 0 of said shaft F, is firmly held in said shaft F by meansof a set-screw and channel, as shown in the model filed in the PatentOffice, or by means of a channel, b, with a shoulder, p, above andshoulder, q, below, into which channel is fitted a collar, m, securelyheld by a set-screw, n, and, preferably, 1 use said collar, channel, andset-screw, mitted to revolve around said arbor K while boring atdifferent angles in the plane.- L is a hollow handle with a head, N,which head- N is chambered to contain a spring-key, O

(which spring-key is shown in Fig. 7, and hereinafter described,)- witha recess, 15, in said head N. Said hollow handleh receives a tool-holdershaft, M, the shank 1- (shown in Fig. 2) of saidshaft M passing throughsaid hollow handle h, as shown in said Fig. 1, and the head a of thesaid shaft F being thus persaid shank r is allowed into the recess a andQ kept-in position by means of a spring'key, O,

which is more fully shown in Fig. 7.

In Fig. 7, O is the spring-key, which has a knob, w, and feet y y, andan open slot, Z,

which is circular at the center. The said spring-key O is pulled outwardby means of the springs y y beingpressed back in the chamber bythe feet9 y, and the then allows said head u of the shank r to pass intothe-recess u of said head N, as shown in Fig. 1, and the knob w beingthen let go, by means of the springsy y, the feet 3 y move back in thechamber, and saidispring-key O fit ting in an annular way, '0, of saidshank r, as shown inyFig. 1, andkecping said shaft M in place, notrigidly, but allowing it to rotate. Upon said shaft M is a bevel-gear,0, (shown in Fig. 1,)which 'saidbevel-gear c rotateswith shaft F. Thebevel-gear c is shoulder chand is held rigidly bevel-gear b on madesolid with in place'by apermanent pin,c, passing through Said shoulder 0prevents a loose jacket, Q, from moving. toward shankr .ofthe said shaftM. Q is a loose jacket fittedover the bevel w ofsaidshaft M, said bevelw 5 preventing said jacket Q frommoving toward l I thejaws S S. Saidloose jacket (l, by means of ascrew-th read, moves a loose barrel, T,haw ing a corresponding thread, said loose jacket Q moving with ahorizontal motion. 1 is a loose barrel, which has a spherical chamber,Vi at its lower or outer end. Said loose barrel has longitudinal ribs U,(shown in Fig. 4,) which lit into and move along keyways V (shown inFig. 3) in tool-holder shalt M; or said barrel may be constructed withkeyways and said shaft with ribs; but preferably l use the mode aboveset forth. Said tool-holder shaft M has on each side slots 4;", intowhich fit the jaws bl 3, each having an angular recess and held in placeby pivots s.

The tool-l1older shaft M has interior angular recesses, .9 (shown inFig. 8,)011 opposite sides from jaws S S, which receive the oppositeangles of any bit placed in said jaws, and so center and assist inholding firmly the bit. When said loose jacket (.1 is turned by means ofsaid horizontal motion, said loose barrel. Tis moved baclr or forward,as may be desired, upon said shaft M, and the loose jaws E iii arebrought into the narrow or wide part of said spherical chamber W, thespace between said jaws E; El'

being accordingly lessened or increased.

.T-laving hereinbefore described the mode of placing into position theseveral parts of my inyention, when it is desired to bore in any anglein the plane parallel with the right arm D, by holding the head of thehollow handle L stationary in the left hand, I turn the bitstocl: by thehandle 0 with the right-hand. The

presser A. being placed against the breast andthe bevel-gear b actingwith the bevel-gear 0 cause the tool-holder shaft ill to rotate the bit,which may be in the jaws S S, said jaws being caused to hold said bitfirmly and rigidly by means of the loose jacket Q and loose bar-- relll, in the manner here'inbefore described. hen it is desired to use .thebit in the ordinary way in a plane perpendicular to the plane of thestraight arm D, the shank r is moved out from the loose handle L. Thespring-key 0 being pulled outward unfastens the head to. The lzeyG beingpulled outward (the screw 7.: being loosed) allows the shaft F, witharbor I I, to drop out of steel; E. Fiaid shank r is then placed in saidbore passing through the slot cl in key G, and the key G being thenpushed back, the slot 6 [its upon the squared portion [5, (shown in Fig.2,) and the screw being tightened the tool-holder shaft M is held.rigidly in place with the loose jac iet Q; and loose barrel 1 thereon,as shown in Fig. 5. It is then operated in the usual manner.

I am aware of Letters Patent No. 95,060, /Vinlrehouse, beptember 21,1869, in which a bit shank and socket, each provided with a recess, areheld by a bolt connected with a spring passing through them; but I avoidany such recess or bolt, and, may hold any bit by myinvention, and in asimpler and diiferent manner, without a spring attachment and use aws.

l are aware of Letters Patent No. 292,587,

Richardson, .lanuary29, 1884:, in which bevelgearing, in combinationwith an independent handle and a ratchet-wheel and paw], is used; but inmy device the bevel gearing acts by means oi'an ordinary handle, notindependent, and is placedupon a different mechanism and in a differentmanner, so that the bit may worlr in a plane parallel to a straight arm,and l avoid the ratchet-wheel and pawl.

I am aware of Letters Patent No. 317,187, Peterson, May 5, 1885, inwhich bevel-gear is used with a double ratchet device or coupling; butin my device l. avoid any ratchet device or coupling.

I am aware of Letters Patent No. 126,395, Ives, May 7, 1872, in. which agrooved barrel, in combination with a follower carrying the jaws, isused; but in my device I avoid the use of a follower, and hold the jawsstationary on the tool-holding shalt, and the barrel in my device worksupon the shaftand not upon the Je I am aware of Letters Patent No.305,090, lllarr and Laughlin, fdeptember 16, 1884., in which is a sternwith bevel-gear working with gear on a horizontal stem, and a yoke andlock.- bar on the brace. in my device I avoid any yoke and lock-bar, andalso avoid two stems and two bevel-gears, and use a bevel-gear in adifferent manner on a different mechanism.-

ll am aware that bevelgear has been used before in connection withbit-stocks; but l am not aware that it has been used in combination withan adjustable arbor, in the manner here inbefore described, to enable abitholding shaft to be placed for use in a plane parallel to a rightarm, and used in the manner hercinbefore described.

I am aware that a loose j aclret has been used in bit-stocks; but in allthese the follower sets upon the jaws directly, and ii am not aware thata loose jacket has been used. acting upon a loose barrel, the j awsbeing pivoted on a shaft.

Whatl claim, and desire to secureby Letters Patent, is

1. In a bit-stock, the combination of the head 13, having a verticalbore and horizontal recess or chamber, with the key G, slotted toreceive and hold a recessed shank, and ad.- justed in the horizontalrecess of said head by ltnob g and fastened by screw it, allsubstantially as set forth.

2. In a bit-stock, in combination, the hollow handle L, having recessedhead N, the

Oil

ICO

spring-key 0, arranged and operating, as described, in said head blandthe tool-holder shaft M, held in said hollow handle by said springkey 0fitting into a recess, a, upon the chant: of said shalt.

3. In a bit-stock, in combinationfthehead E, the removable shaft F, withbevel-gear b thereon, the key G, fastening said-shaft into said head, asdescribed, the hollow handle lb, with arbor K, arranged to operate inthe recess of shaft F, the tool-holder shaft M, with pivoted jaws B S,spring-hey 0*, arranged to hold said shaft M in said handle lo,bevel-gear c, fixed on said shaft M and engaging and operating with gearb, the loose jacket Q, and the t 4. In a bit-stock, the combinationof-the.

tool-holder shaft M, having pivoted jaws, with [O loose barrel '1.having ribs to move in keyways on shaft, and a chamber, W, to allow saidjaws to open and close, and provided with an external screw-thread, andthe loose jacket Q; provided with an internal screwthread to move saidloose barrel and secured 5 on said shaft M, but allowed to rotate,allsubstantially as described and shown. .t

In testimony whereof Ihave signed my name to this specification; inthepresence of two subscribing witnesses, on'this 27th day of April, 20

. HENRY SMILEY;

Witnesses":

W. HAYNES, GEO. M. BIRD.

